Method for displaying alternative navigation route, and navigation device

Abstract

A navigation device according to an embodiment may include: a user interface for receiving an input from a user and displaying a route; and a control unit controlling the user interface to display the route to a destination input by the user; when an intersection on the route to the destination is selected by the user, determining at least one alternative route that passes through an intersection other than the selected intersection among a plurality of intersections of a road being traveled by a vehicle; and controlling the user interface to display the at least one alternative route. The navigation device suggests at least one alternative route that passes through an intersection other than an intersection selected by a user input, and thus has the effect of expanding the range of routes available for selection by a user.

What is claimed is: 
     
         1 . A navigation device comprising:
 a user interface receiving an input from a user and displaying a route; and   a control unit controlling the user interface to display a route to a destination based on the input from the user, determining at least one alternative route using a different junction from the selected junction among multiple junctions on a road traveled by a vehicle when the user selects a junction on the route to the destination, and controlling the user interface to display the at least one alternative route,   wherein the at least one alternative route comprises:   a first alternative route using a junction located before the selected junction on the road traveled by the vehicle, and   a second alternative route using a junction located after the selected junction on the road traveled by the vehicle.   
     
     
         2 . The navigation device of  claim 1 , wherein the control unit controls the user interface to display comparison information for each of the at least one alternative route with the existing route. 
     
     
         3 . The navigation device of  claim 2 , wherein the comparison information comprises at least one of information on the increase or decrease in distance compared to the existing route, information on the increase or decrease in time compared to the existing route, and information on the increase or decrease in cost compared to the existing route. 
     
     
         4 . The navigation device of  claim 1 , wherein the control unit controls the user interface to display the selected alternative route when the user selects any one of the at least one alternative route. 
     
     
         5 . The navigation device of  claim 1 , wherein the control unit replaces the existing route with the selected alternative route when the user selects any one of the at least one alternative route. 
     
     
         6 . A method of controlling a navigation device comprising a user interface, the method comprising:
 controlling the user interface to display a route to a destination based on an input from a user;   determining at least one alternative route using a different junction from the selected junction among multiple junctions on a road traveled by a vehicle when the user selects a junction on the route to the destination; and   controlling the user interface to display the at least one alternative route,   wherein the at least one alternative route includes:   a first alternative route using a junction located before the selected junction on the road traveled by the vehicle, and   a second alternative route using a junction located after the selected junction on the road traveled by the vehicle.